Knife having a serrated edge



June 5, 1951 N. L. ESTABROOKS 2,555,735

KNIFE HAVING A SERRATED EDGE Filed April 19, 1947 INVENTOR. ?W 90 WPatented June 5, 1951 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a knife having a serrated cutting portion.

The principal object of my invention is to provide a knife, particularlya table knife, with serrations on both sides to thereby provide acutting edge of unusual efliciency.

I am aware that other have serrated a knife blade adjacent the cuttingedge in various ways; and my purpose is to provide a serrated cuttingedge for a knife that is more effective than others previously known,especially for cutting meat, such as steak or other fibrous food.

Another object is to provide such a cutting edge that will remaineffectively sharp even though partly worn away by use.

The foregoing and other objects which will appear as the nature of theinvention is better understood, may be accomplished by a constructionand formation such as is disclosed by the drawings and specification.The nature of the invention is such as to render it susceptible tochanges and modifications, and, therefore, I am not to be limited tosaid disclosure; but am entitled to all such changes therefrom as fallwithin the scope of my claim.

In the drawings:

Figure 1 is a top plan view of one side of a table knife embodying myinvention.

Figur 2 is a similar view of the other side thereof.

Figure 3 is a fragmentary, top plan view, many times enlarged, of oneside face of a knife showing the serrations and tip edges.

Figure 4 is a similar View of the other side face of said knife.

Figure 5 is a sectional view, many times enlarged, taken on the line 5-5of Figure 1.

Figure 6 is a sectional view, similar to Figure 5 but showing the teethor tip edges in substantial alinement.

As illustrated, a table knife has the usual handle I0 and blade portionI2. serrations I4 are made in both side surfaces. Said serrations orindentures extend to and preferably pass through the original cuttingedge of the blade. They start from an intermediate portion of the sidesurfaces of said blade, near the original cutting edge thereof, andpreferably take off a little of said edge thereby presenting tip edgesI6 spaced apart which provide the final cutting edge of said blade. Theserrations I4 on one side may extend laterally beyond the center ororiginal cutting edge of the blade and the tip edges I6 slant from theouter side inwardly to a point beyond the center so they are slightlyoffset from the center. Those serrations I4 cut in the other side alsoextend beyond the center, and the tip edges I6 are offset from thecenter and so they are staggered with relation to the first-mentionedtip edges, as illustrated in Figure 5 of the drawings. Said tip edges[6, which may be portions of the original edge, may all be insubstantial alinement if desired as shown in said Figure 6. Also theserrations I4 may extend only to the very tip of the sharp edge of theblade. The positions of the tip edges IS, with relation to each other,is a matter to be decided by the results desired and the quality ofmaterial in the blade. The staggered tip edges l9 provide a cross-cuteffect similar to that of a cross-cut saw, whereas the straight edgeformed of tip edges, when they are in alinement, are more like a knifeedge and make a smoother out,

It will be noted in said Figures 1 and. 2 that said serrations I4 extendto the front extremity of said blade, which has a rounded end, thusproviding a serrated edge at the tip portion of said blade.

What I claim is:

A knife comprising a blade having a cutting edge, said blade having aplurality of serrations therein on each side face thereof, saidserrations on one side face extending from an intermediate portion ofsaid blade towards the cutting edge extremity thereof and in a diagonaldirection with respect to said cutting edge extremity towards the tipend of said blade, said serrations on the other side face extending froman intermediate portion of said blade towards the cutting edge extremitythereof and in a diagonal direction with respect to said cutting edgeextremity and opposite to that of the first-mentioned side serrations,said cutting edge comprising teeth spaced apart and recesses betweensaid teeth, said recesses being in communication with and. acontinuation of said serrations, said teeth being in substantialalinement along said cutting edge.

NORMAN LEWIS ESTABROOKS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

